| Summary: | 碩士 === 國立交通大學 === 資訊工程學系 === 84 === In video-on-demand(VOD) services, the video server plays an
important role in handling the huge amount of video data
andmanaging the users' requests quickly. Also, the design of the
server must also take the cost into consideration. Similar tothe
caching policy, we can use a hierarchical storage system to
improve the performance of the system without greatly raising
the cost of the server. The hierarchical storage system stores
all videos in CD-ROMs which are managed by the jukebox and the
disks are used as the cache of CD-ROMs. However, designing a
video server is not a simple task since it involves complex
interaction among the components of the server. In the design of
some parts of a server, most researchers limit their simulation
in a small range of the server since it is difficult to simulate
the whole server. Hence, in this thesis, a simulation model is
proposed for designers of video servers using hierarchical
storage systems so that they can easily simulate their design
using the simulation system with only little modification.
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